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Proceedings Paper

Size effects on the properties of high z scintillator materials
Author(s): Bernadette A. Hernandez-Sanchez; Timothy J. Boyle; Janelle Villone; Pin Yang; Mark Kinnan; Sarah Hoppe; Steve Thoma; Khalid M. Hattar; F. Patrick Doty
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Paper Abstract

Particle size effects of nano- and polycrystalline metal tungstate MWO4 (M = Ca, Pb, Cd) scintillators were examined through a comparison of commercially available powders and solution precipitation prepared nanoscaled materials. The scintillation behaviors of nanoparticles and commercial powders were examined with ion beam induced luminescence (IBIL), photoluminescence (PL), and cathodoluminescence (CL) spectroscopy techniques. For commercial microns sized MWO4 powders, spectral emission differences between CL and PL were only observed for Cd and Pb tungstates when compared to reported single crystals. The IBIL wavelength emissions also differed from the commercial MWO4 CL and PL data and were red shifted by 28 and 14 nm for CaWO4 and CdWO4; respectively, while PbWO4 had no significant change. IBIL analysis on CaWO4 nanoparticles produced a 40 nm blue shift from the commercial powder emission. These preliminary results suggest that both size and cation Z may affect the emission properties of the MWO4 scintillators.

Paper Details

Date Published: 19 October 2012
PDF: 6 pages
Proc. SPIE 8509, Penetrating Radiation Systems and Applications XIII, 85090G (19 October 2012); doi: 10.1117/12.930163
Show Author Affiliations
Bernadette A. Hernandez-Sanchez, Sandia National Labs. (United States)
Timothy J. Boyle, Sandia National Labs. (United States)
Janelle Villone, Sandia National Labs. (United States)
Pin Yang, Sandia National Labs. (United States)
Mark Kinnan, Sandia National Labs. (United States)
Sarah Hoppe, Sandia National Labs. (United States)
Steve Thoma, Sandia National Labs. (United States)
Khalid M. Hattar, Sandia National Labs. (United States)
F. Patrick Doty, Sandia National Labs. (United States)

Published in SPIE Proceedings Vol. 8509:
Penetrating Radiation Systems and Applications XIII
Gary P. Grim; H. Bradford Barber, Editor(s)

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